@matheusbsbs / matheus-bagliano / commits / aa561208d9

push: refactor refspec_append_mapped() for subsequent leak-fix

The set_refspecs() caller of refspec_append_mapped() (added in [1]) left open the question[2] of whether the "remote" we lazily fetch might be NULL in the "[...]uniquely name our ref?" case, as remote_get() can return NULL. If we got past the "[...]uniquely name our ref?" case we'd have already segfaulted if we tried to dereference it as "remote->push.nr". In these cases the config mechanism & previous remote validation will have bailed out earlier. Let's refactor this code to clarify that, we'll now BUG() out if we can't get a "remote", and will no longer retrieve it for these common cases where we don't need it. 1. ca02465b413 (push: use remote.$name.push as a refmap, 2013-12-03) 2. https://lore.kernel.org/git/c0c07b89-7eaf-21cd-748e-e14ea57f09fd@web.de/ Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Ævar Arnfjörð Bjarmason committed Feb 7, 2023 at 00:07 UTC aa561208d9d41d757ede1fb40d3ae2c164a21f97
1 file changed +17 -12
builtin/push.c
+17 -12
index 60ac8017e5..97b35eca3a 100644 --- a/builtin/push.c +++ b/builtin/push.c @@ -63,16 +63,9 @@ static struct refspec rs = REFSPEC_INIT_PUSH; static struct string_list push_options_config = STRING_LIST_INIT_DUP; static void refspec_append_mapped(struct refspec *refspec, const char *ref, - struct remote *remote, struct ref *local_refs) + struct remote *remote, struct ref *matched) { const char *branch_name; - struct ref *matched = NULL; - - /* Does "ref" uniquely name our ref? */ - if (count_refspec_match(ref, local_refs, &matched) != 1) { - refspec_append(refspec, ref); - return; - } if (remote->push.nr) { struct refspec_item query; @@ -120,12 +113,24 @@ static void set_refspecs(const char **refs, int nr, const char *repo) die(_("--delete only accepts plain target ref names")); refspec_appendf(&rs, ":%s", ref); } else if (!strchr(ref, ':')) { - if (!remote) { - /* lazily grab remote and local_refs */ - remote = remote_get(repo); + struct ref *matched = NULL; + + /* lazily grab local_refs */ + if (!local_refs) local_refs = get_local_heads(); + + /* Does "ref" uniquely name our ref? */ + if (count_refspec_match(ref, local_refs, &matched) != 1) { + refspec_append(&rs, ref); + } else { + /* lazily grab remote */ + if (!remote) + remote = remote_get(repo); + if (!remote) + BUG("must get a remote for repo '%s'", repo); + + refspec_append_mapped(&rs, ref, remote, matched); } - refspec_append_mapped(&rs, ref, remote, local_refs); } else refspec_append(&rs, ref); }